(Q2).A cylinder of radius 12 cm. contains water to a depth of 20 cm. A spherical iron ball is dropped into the cylinder and thus the level of water is raised by 6.75 cm. Find the radius of the ball. [π =
22
7
]
Rise in the water level is seen as a cylinder of radius ‘r’ = 12 cm
Height, h = 6.75 cm.
Volume of the rise = Volume of the spherical iron ball dropped